Warper stop motion



April 12, 1932. LEONARD 5 1,853,909

WARPER STOP MOTION Filed Dec. 12, 1930 2 Sheets- Sheet 1 \nvenTor.

HarryA. Leonard v ATTys.

April 9 H. A. LEOIQARD v 1,853,909

WARPER STOP MOTI ON 'F iled Dec. 12, 1930 2 sheets-sheet 2 \nvenTor.

Huffy A. Leonard byfamdWd/W A1 Tys.

Patented Apr. 12, 1932 UNITED, sTAres PATENT oFFic 1 HARRY A. LEONARD, or HOIE'EDALE, MASSACHUSETTS, nssrenoa 'ro DRAPER con- IEORATION, or HOPEDALE, MASSACHUSETTS, AicoRPoaArroN- or MAINE WARPER STOP, MOTION.

Application filed December 12, 1930'. Serial 1T0. "501,777.-

warping machines such as shown in. the pat ents to Rhoades, No. 624,541, May 9, 1899,

i No. 1,254,936, January 29, 1918, and No. 1,523,361, January 13, 1925. Warping machines are commonly provided with a stop motion mechanism actuatedin either of two ways, first, by the completion of the'passage through the machine of a predetermined length of warp and, second, upon the absence or failure of any warp end. l i The present invention'has for its object to provide a simple, efiicient, and durable form of mechanism for the latter purpose, that is,- for the actuation of the stop motion mechanism to stop the warper upon absence. or failure of any warp end.

The nature and objects of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claims.

As the type of warping machine in whichv the preferred form of the invention is shown as embodied is fully illustrated and described in theRhoades patents above referred to and is wellxknown and familiar to those skilled in the art, it will only be necessary here to illustrate and describe in detail those features of the warping machine necessary to a disclosure of a preferred embodiment of the present invention.

In the drawings:

Fig. 1 is an end elevation of a warping machine of usual'construction with some of the parts removed.

Fig. 2 is a rear elevation of a portion of awarp stopmotion. v

Fi 3 is a detail in end elevation of the knoc -oif mechanism and associated parts in whichthe main features of the present inven tion are preferably embodied.

Fig. 4 is a View similar to the parts in a difl'erentp'osition.

Fig. 5 is abottom'plan view of the construction shown in Fig. 3. I

The warper is shown as comprising end frames, the right-hand frame 1 being shown.

These frames are connected in the usual manner and have mountedtherein the various Fig. 3 showing shafts required. iItis assumed, as. in the Rhoades patents, thatthe movement of the V shaft 2 starts and stops the warper, a movement of this shaft in the direction of the arrow 3 being utilized to stop the warper and the movement in the opposite direction to start it. The shaft 2 has fast upon it. outside the end frame '1 the arm 4 to which is pivotally connectedat5a shipper rod 6 extending up through an apertured holding plate 7. This plate 7,.in the constructionillustrated, is a V laterally projecting portion of a bracket 8 vertically slotted at 9' andrigidly and adjustably secured tothe warper frame by the bolt 10. The shipper rod 6 is provided with a shoulder 11 to engage the underside ofthe apertured plate-7. When this shoulder is thus in engagement with the apertured' plate, the parts are in running position. If, as in the said Rhoades patents, the upper end of the shipper lever be swung'or knocked to the left to release-theshoulder 11 from the plate 7 the shipper rod rises vertically, the shaft 2 rotates inthe directionof the'arrow 3, and

the warper is stopped.

' In orderto throw the shipper rod from the running position shown in Fig. 1 to a position to release the shoulder 11 from the plate 7, or toward the left, a knock-off mechanism is provided: actuated both from the warper measuring mechanism andv from the warp stop motion. In the preferred construction illustrated, this knock-off mechanism com-f prises a knock-off lever 12 fulcrumed at 13 on the bracket 8 so positioned that if its upper arm 14 be moved to the right or its lower arm 15 moved to the left, it will engage the shipper lever 6 and knock the shoulder 11 from ens gagement with the plate 7 thus to effect the stopping of the warper.

. Thewarper comprises the usualvibrating arm 16 extending upwardfrom and constant- 1y vibrated by a shaft 17 during the operation of the warper. 'This vibratingarm carries the pawl. 18 for operating the warper clock or warp measuring mechanism shown gen erally at 19 and it also carries pivoted thereto at its upper end at 20'the L-shaped latch 21.

. et 8. A latch 29 is pivoted at on the bracket of warp, it acts, through the usual type of mechanism, to permit the latch 21 to drop to the left of the arm 14 of the knock-off lever so that on the next vibration of the arm 16 to the right, the knock-off lever will be rocked to knock ofi the shipper and stop the warper.

The present invention has to do with the operation of the knock-off mechanism when any warp end breaks or fails. For this purpose, in the preferred construction illustrated, there is pivoted to the lower end of the arm 15 of the knock-off lever at 22 a pawl having a body portion 23 and an effective end portion 24, and there is adjustably secured to the vibrating arm 16 by the bolt 25 a lateral projection or striker 26. Thepawl 23, 24, constitutes a transmitter for transmitting the movement of the vibrating arm 16 to the knock-ofi lever. This pawl normally stands out of the path of the striker 26. When the warp stop motion acts, it is moved transversely, or in this case downward, into the path of the striker and then, when the vibrating arm moves tothe left, an endwise movement is imparted thereby to the pawl and thereby the knock-oif lever is rocked to knock ofi' the shipper and stop the warper.

The pawl is normally held in its inactive position by a light spring 27 connecting the body of the pawl 23 to a screw 28 in the brack- 8 and is provided with'the latching shoulder 31. Normally the parts stand as shown in Fig. 3 with the extreme end 32 of the body 23 of the pawl holding the latch swung to the right. When the pawl is depressed to bring it into transmitting position, the end 32 passes beneath the shoulder 31 and the latch swings by gravity into latched position'shown in Fig. 4.

Since the work of operating the knock-0E mechanism is entirely done by the powerful vibrating arm 16 imparting an endwise move ment'to the pawl, it will be seen that the only work required of the warp stop motion is to give the pawl a movement from itsunlatched or non-transmitting position to its latched'or transmitting position. The only force required for this purpose is that necessary to overcome the light tension of the small spring 27 or whatevermeans is employed for holding the pawl in its unlatched position. Con sequently there may be employed a warp stop motion of that type which operates a Bowden wire. Such a warp stop motion is shown generally in Fig. 2 and of similar construction and operation to that shown in the patent to Davis, No. 1,538,625, May 19, 1925. This mechanismcomprises drop wires such .as 33, one for each warp end, and the notched bars 34 given a relative reciprocation by a suitable connection such as 35 from the shaft 17. l/Vhen a warp end breaks or fails, a drop wire 33 held up thereby falls, locking thenotched bars 34 against relative reciprocation, and

thereupon causing the arm 36 to depress the core 3'? in the sheath 38 of a Bowden wire. In the construction illustrated, the sheath 38 of the Bowden wire is secured in a lateral projection 39 from the bracket 8 in such position that the core 37 extends through the projection and abuts on top of the pawl body 23. It will thus be seen that when a warp end breaks and the core 37 of the Bowden wire is projected, it will act to swing thepawl' from its unlatched position shown in Fig. 3 to its latched or transmitting position shown in Fig. 4.

But the actionof the warp stop motion with its consequent movement of the pawl may take place at any time and consequently may take place when the vibrating arm has advanced or moved to the left beyond its pawl-engaging position. To prevent any damage or breakage, the effective end 24 of the pawlis yieldable with respect to the body,.for that purpose being pivoted at 40130 the pawl-body 23. Consequently if the striker 26is beneath the portion 24 of the pawl when the stop mo tion acts, this portion of the pawl will yield, but as the vibrating arm moves to'the right, this portion of the pawl 24 will immediately drop into transmitting position so as to be caught by the striker upon the next vibration of the arm 16 to the left.

There is thus presented a very simple and efficient means for stopping the warper upon the absence or breakage of any warp end. This mechanism requires very little force to be exerted by the warp stop motion because the work is all done by the relatively powerful movement of the vibrating arm 16. Furthermore, all the parts are compact and for the most part are readily assembled before at tachment tothe loom. It will be noted that the plate 7 for holding'the notched end ofthe shipper 6, the knock-off lever 14, 1.5, thepawl 23, 24, the spring 27, the latch 29, and the projection 39 to which the Bowden wire sheath is secured are all part of or directly connected to the single bracket 8 which is clamped to the warper end frame by the bolt 10. Thusall these parts may be accurately assembledand related to each other while'the striker 26 is readily secured to the. vibrating arm 16 130 cooperate with the parts on the bracket .8. Furthermore, this mechanism does not interfere in any way with theoperation of the knock-off mechanism under the control of the warper clock inthe usual manner.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is:

1. A warper comprising stopping mecha. nism, a knock-oil device movableto actuate the stopping mechanism to stop the warper, an arm vibrated by the warper when in operation, a-pawl pivoted to the'knock-off device, a latch for holding-the pawl in thepath of the vibrating arm, the said pawl having that I portion engaged by the vibrating arm yield= able to permit the pawl to be moved to latchf= ed position when the vibrating armis ad= vanced beyond its pawl engaging position,- means acting to hold the pawl normally unlatched position, and a warp stop motion including a Bowden wire acting when a;

"warp breaks to project the core and cause acting upon failure of a warp positively to move the transmitter into transmitting position and thereby to cause the arm to move I the knock-01f device to actuate the stopping mechanism to stop the warper, in which combination a portion of the transmitter is yield-, able to permit the transmitter to be moved to transmitting position when the vibrating 1 arm is advanced beyond its position for mov- 'the knock-off device, a latch for holding the pawl in the path of the vibrating arm, a spring acting to hold the pawl normally in unlatched position and a warp stop motion including a Bowden wire acting when a warp breaks to project the core and cause the core thereby to move the pawl against its spring into latched position, in which combination the pawl comprises a body pivoted to the knock-0E device and a vibrating arm engaging portion pivoted to the said body, whereby when the pawl is moved, to latched position with the vibrating arm. advanced beyond its pawl engaging position the arm engaging portion of the pawl may yield on its pivot. j

4. In a warper stop motion, a pivoted knock-0E device, a pawl body pivoted thereto, a pawl end pivoted to the pawl body, a spring acting to hold the pawl out of oper ative position, and a latch acting to hold the pawl in operative position 'when moved thereto.

5. In a warper stop motion, the construction defined in claim 4, together with a Bowden wire, the core of which engages the pawl and acts when projected to move the pawl against its spring into operative latched position.

In testimony whereof I have signed my name to this specification.

HARRY ALEONABD. 

